2008 week1 - BA 1306 Information Systems and Programming...

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BA 1306 Spring 2007 BA 1306 Information Systems and Programming Asst. Prof. Engin Kucukkaya
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BA 1306 Spring 2007 Introduction Lecture Outline: The Big Picture Hardware Data Communications The Internet Classification of Computers Software
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BA 1306 Spring 2007 The Big Picture The computer systems have three main components: Hardware , software and people. The equipment associated with a computer system is called hardware. The programs, or step-by-step instructions that run the machines, are called software. Computer programmers write programs for users, or end-users people who purchase and use computer software.
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BA 1306 Spring 2007 Hardware A computer is a machine that can be programmed to process data (input) into useful information (output). A computer system requires four main aspects of data handling: Input Processing Output Storage .
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BA 1306 Spring 2007 Hardware: The basic components Input is data to be accepted into the computer Common input devices are keyboard, mouse, joystick, and scanner. Storage devices and communication devices can also be used for input.
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BA 1306 Spring 2007 Input A keyboard is a common input device that may be part of a personal computer or a terminal connected to a remote computer. A mouse is an input device with a ball on its underside, whose movement on a flat surface causes a corresponding movement on the screen. Moving the mouse allows you to reposition the pointer, or cursor, an indicator on the screen that shows where the next interaction with the computer can take place. Mouse technology is now shifting towards optical mouse, where light beams emitted by the mouse are used to capture the movement.
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BA 1306 Spring 2007 Input A trackball is like an upside-down mouse—the ball is rolled with the hand. A touch pad invokes a command with finger movement.
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BA 1306 Spring 2007 Input A scanner converts text, drawings and pictures into computer-recognizable form Types of scanners Flatbed Sheetfeed Handheld Overhead Drum Handheld Overhead Sheetfeed
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BA 1306 Spring 2007 Input Voice input, or speech recognition, is the process of presenting input data to the computer through the spoken word. Speech recognition devices convert spoken words into a digital code that a computer can understand. The two main types of devices are
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BA 1306 Spring 2007 Input Input can be given directly to a computer via a touch screen; a finger touching the screen interrupts the light beams on the monitor edge, pinpointing the selected screen location. A user can deliver input to a computer by looking at a screen, assuming electrodes are attached to the skin near the user's eyes so that their signals can be read by the computer system.
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BA 1306 Spring 2007 The processor, or central processing unit ( CPU ), processes raw data into meaningful, useful information. The CPU interprets and executes program instructions and
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2008 week1 - BA 1306 Information Systems and Programming...

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